Measurement Computing Digital232 - Manual (Page 44)

Section 3 Command Descriptions
3.22
I### Invert Control Lines
I0 All control and data lines are active high
I1 Inhibit output is active low
I2 Trigger output is active low
I4 Data Strobe Output is active low
I8 Clear output is active low
I16 Data is active low
I32 EDR input is falling edge sensitive
I64 Service input is falling edge sensitive
Note: the status indication reflects the sum of all received Invert commands.
P# Selected Port
P0 All five ports are selected
P1 Port 1 is selected
P2 Port 2 is selected
P3 Port 3 is selected
P4 Port 4 is selected
P5 Port 5 is selected
R# Data Ready
R0 Data is sent to the host immediately
R1 Data is latched on EDR transition, and sent to the host
R2 Data is sent to the host upon receipt of the serial terminator.